1 definition by Don'tKillBill

1

A day when schools close because of smog or air pollution.

I'm so excited! The government just declared tomorrow a smog day! I'm going to play video games all day!

by Don'tKillBill January 30, 2019

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• © 1999-2021 Urban Dictionary ® • advertise • terms of service • privacy • dmca • bug report • help • blog • data subject request